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dc1c57af91
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14014 Commits

Author SHA1 Message Date
Benjamin Kramer
dc1c57af91 SimplifyCFG: If we have a PHI node that can evaluate to NULL and do a load or store to the address returned by the PHI node then we can consider this incoming value as dead and remove the edge pointing there, unless there are instructions that can affect control flow executed in between. 
In theory this could be extended to other instructions, eg. division by zero, but it's likely that it will "miscompile" some code because people depend on div by zero not trapping. NULL pointer dereference usually leads to a crash so we should be on the safe side.

This shrinks the size of a Release clang by 16k on x86_64.

llvm-svn: 138618
 2011-08-26 01:22:29 +00:00
Bill Wendling
077e9ea84b Update to the new EH scheme. 
llvm-svn: 138606
 2011-08-25 23:48:37 +00:00
Bruno Cardoso Lopes
5b3d2c9e17 Add support for AVX 256-bit version of MOVDDUP! 
llvm-svn: 138588
 2011-08-25 21:40:37 +00:00
Owen Anderson
d387b48b0b Port over additional encoding tests to decoding tests, and fix an operand ordering bug this exposed. 
llvm-svn: 138575
 2011-08-25 18:30:18 +00:00
Andrew Trick
0dd0ae11f8 ARM fix for missing implicit operands on ldmia_ret. 
rdar://10005094: miscompile of 176.gcc

llvm-svn: 138568
 2011-08-25 17:50:53 +00:00
Craig Topper
5af7ba783d Give ATTR_VEX higher priority when generating the disassembler context table. Fixes disassembling of VEX instructions with 'pp'=00. Fixes subset of PR10678. 
llvm-svn: 138552
 2011-08-25 07:42:00 +00:00
Craig Topper
06ed6cb856 Add TB encoding to VEROALL, VZEROUPPER, and VCVTPS2PD to allow them to be disassembled. Fixes PR10723. 
llvm-svn: 138551
 2011-08-25 06:57:46 +00:00
Bill Wendling
1eec5affec LSR wants to split the landing pad's critical edge. Let it do it, but use the 
proper function to do it.

llvm-svn: 138550
 2011-08-25 05:55:40 +00:00
Bruno Cardoso Lopes
5d34219953 Add support for 256-bit versions of VSHUFPD and VSHUFPS. 
llvm-svn: 138546
 2011-08-25 02:58:26 +00:00
Bill Wendling
52624973c8 Update tests to the newest EH syntax. 
llvm-svn: 138541
 2011-08-25 01:30:18 +00:00
Bill Wendling
892a6238e9 Add feature test for the new exception handling stuff. 
llvm-svn: 138539
 2011-08-25 01:19:13 +00:00
Eli Friedman
b6597a2e70 Hook up 64-bit atomic load/store on x86-32. I plan to write more efficient implementations eventually. 
llvm-svn: 138505
 2011-08-24 22:33:28 +00:00
Evan Cheng
7bfc442b2d Some autoconf tests use module level inline asm to test compiler's handling of 
.cfi_startproc. e.g. libffi:

 $ cat confopt.c 
asm (".cfi_startproc\n\t.cfi_endproc");

int main () { return 0; }

Teach MC / dwarf emission to handle these cfi directives which essentially
create an empty frame.

rdar://10017184

llvm-svn: 138504
 2011-08-24 22:31:37 +00:00
Jim Grosbach
aae1749f65 Update tests for 138501. 
llvm-svn: 138502
 2011-08-24 22:30:18 +00:00
Jim Grosbach
effaf1e15d Thumb parsing and encoding for SUB (SP minu immediate). 
Fix FiXME in test file. Remove FIXME for SUB (SP minus register) since that
form is Thumb2 only.

llvm-svn: 138494
 2011-08-24 21:42:27 +00:00
Jim Grosbach
b2b155a93f Thumb parsing and encoding support for ADD SP instructions. 
Fix the test FIXME and add parsing support for the ADD (SP plus immediate)
and ADD (SP plus register) instruction forms.

llvm-svn: 138488
 2011-08-24 21:22:15 +00:00
Eli Friedman
688794e1d1 Basic tests for atomic load and store on x86. 
llvm-svn: 138486
 2011-08-24 21:16:59 +00:00
Nadav Rotem
43673d6d0b Implement Constant::isAllOnesValue(). Fix ConstantFolding to use the new api. 
llvm-svn: 138469
 2011-08-24 20:18:38 +00:00
Owen Anderson
6325690c08 Port over more encoding tests to decoding tests. 
llvm-svn: 138441
 2011-08-24 17:08:34 +00:00
Richard Osborne
6b6b0b535d Add Uses=[SP] to call instructions. This fixes a miscompilation with a 
variable sized alloca.

llvm-svn: 138433
 2011-08-24 13:32:43 +00:00
Craig Topper
1da38a34a6 Break 256-bit vector int add/sub/mul into two 128-bit operations to avoid costly scalarization. Fixes PR10711. 
llvm-svn: 138427
 2011-08-24 06:14:18 +00:00
Bruno Cardoso Lopes
8959b54713 Fix a nasty bug where a v4i64 was being wrong emitted with 32-bit 
permutations. Also tidy up some patterns and make them close to their
instruction definition!

llvm-svn: 138392
 2011-08-23 22:06:37 +00:00
Eric Christopher
aa4993b9aa Revert "Address Duncan's CR request:" 
This reverts commit 20a05be15ea5271ab6185b83200fa88263362400. (svn rev 138340)

Conflicts:

	test/Transforms/InstCombine/bitcast.ll

llvm-svn: 138366
 2011-08-23 20:11:10 +00:00
Jim Grosbach
f5d628146a Thumb parsing and encoding for WFE, WFI and YIELD. 
llvm-svn: 138364
 2011-08-23 20:02:30 +00:00
Jim Grosbach
9f0be95d20 Thumb parsing and encoding for UXTB and UXTH. 
llvm-svn: 138363
 2011-08-23 19:59:32 +00:00
Jim Grosbach
87c7a2b16b Thumb parsing and encoding for TST. 
llvm-svn: 138362
 2011-08-23 19:53:17 +00:00
Jim Grosbach
7ceb45dd61 Thumb parsing and encoding for SXTB and SXTH. 
llvm-svn: 138361
 2011-08-23 19:51:42 +00:00
Jim Grosbach
1f5b8e9044 Thumb parsing and encoding for SVC. 
llvm-svn: 138360
 2011-08-23 19:49:10 +00:00
Jim Grosbach
d343e1a13f Thumb parsing and encoding for SUB. 
llvm-svn: 138359
 2011-08-23 19:45:45 +00:00
Nick Lewycky
11874a4e0a PerformSubCombine to work on integers larger than i128. Fixes a crasher. 
llvm-svn: 138354
 2011-08-23 19:01:24 +00:00
Jim Grosbach
9795206370 Thumb parsing and encoding for STRH. 
llvm-svn: 138352
 2011-08-23 18:56:20 +00:00
Jim Grosbach
d507a9c6b9 Thumb parsing and encoding for STRB. 
llvm-svn: 138349
 2011-08-23 18:43:06 +00:00
Jim Grosbach
f9bc99b518 Thumb parsing and encoding for tSTRspi. 
llvm-svn: 138348
 2011-08-23 18:39:41 +00:00
Jim Grosbach
7ece5d431c Thumb parsing and encoding for STR. 
Not including tSTRspi.

llvm-svn: 138347
 2011-08-23 18:33:38 +00:00
Jim Grosbach
3b20e779cd Thumb parsing and encoding for STM. 
llvm-svn: 138345
 2011-08-23 18:15:37 +00:00
Nadav Rotem
442df41879 Fix a typo in the test from the previous commit. 
llvm-svn: 138342
 2011-08-23 17:56:54 +00:00
Owen Anderson
3de2d7656d Fix decoding of Thumb2 prefetch instructions, which account for all the remaining Thumb2 decoding failures found by randomized testing so far. 
llvm-svn: 138341
 2011-08-23 17:51:38 +00:00
Nadav Rotem
d449bc9bff Address Duncan's CR request: 
1. Cleanup the tests in ConstantFolding.cpp
2. Implement isAllOnes for Constant, ConstantFP, ConstantVector

llvm-svn: 138340
 2011-08-23 17:48:43 +00:00
Owen Anderson
9d5074746f Fix two more instances of mis-matched operand names breaking disassembly. Found by randomized testing. 
llvm-svn: 138337
 2011-08-23 17:37:32 +00:00
Owen Anderson
b97912374e Port more assemble tests over to disassembly tests. 
llvm-svn: 138336
 2011-08-23 17:26:35 +00:00
Craig Topper
67b22aedb4 Add support for breaking 256-bit v16i16 and v32i8 VSETCC into two 128-bit ones, avoiding sclarization. Add vex form of pcmpeqq and pcmpgtq. Fixes more cases for PR10712. 
llvm-svn: 138321
 2011-08-23 04:36:33 +00:00
Bruno Cardoso Lopes
8024703a16 Introduce a pass to insert vzeroupper instructions to avoid AVX to 
SSE transition penalty. The pass is enabled through the "x86-use-vzeroupper"
llc command line option. This is only the first step (very naive and
conservative one) to sketch out the idea, but proper DFA is coming next
to allow smarter decisions. Comments and ideas now and in further commits
will be very appreciated.

llvm-svn: 138317
 2011-08-23 01:14:17 +00:00
Jim Grosbach
455795fb04 Thumb parsing and encoding for SETEND. 
llvm-svn: 138312
 2011-08-22 23:58:02 +00:00
Jim Grosbach
d299db0857 Thumb parsing and encoding for SBC. 
llvm-svn: 138311
 2011-08-22 23:55:58 +00:00
Jim Grosbach
5ae40d73a6 Thumb parsing and encoding for RSB. 
llvm-svn: 138308
 2011-08-22 23:47:13 +00:00
Jim Grosbach
9aa40e0f7c Thumb parsing and encoding for ROR. 
llvm-svn: 138304
 2011-08-22 23:40:51 +00:00
Jim Grosbach
c4109eef36 Thumb parsing and encoding for REV/REV16/REVSH. 
llvm-svn: 138303
 2011-08-22 23:39:25 +00:00
Owen Anderson
d5b7d73696 t2SMLAD is a four-register instruction, not a three-register one. 
llvm-svn: 138301
 2011-08-22 23:31:45 +00:00
Owen Anderson
c395a07c42 Correct operand naming of t2USAT16 to allow proper decoding. 
llvm-svn: 138300
 2011-08-22 23:27:47 +00:00
Owen Anderson
9e750147fb Match operand naming to allow correct decoding of t2LDRSH_POST. 
llvm-svn: 138298
 2011-08-22 23:22:05 +00:00